Siemens ESM - Manual (Page 38)

Network Topologies with OSM/ESM
Industrial Ethernet OSM/ESM
34 C79000-Z8976-C068-10
1 Fibr
e-opt
ic (
F
O
)
2 IT
P X
P
standar
d
cab
le
1
Ring
1 (O
SM
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ing)
Ring
3 (O
LM
ring)
Ring
2 (E
SM
ring)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
2
2
2
Po
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2
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OSM
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OSM
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S
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r
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Po
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OS
M
I
T
P
62
OS
M
I
T
P
62
OS
M
I
T
P
62
OS
M
I
T
P
62
OS
M
I
T
P
62
OS
M
IT
P
62
OS
M
I
T
P
62
OS
M
I
T
P
62
OS
M
I
T
P
62
OS
M
I
T
P
62
OS
M
I
T
P
62
OS
M
I
T
P
62
OS
M
I
T
P
62
OS
M
I
T
P
62
OS
M
I
T
P
62
ESM I
T
P 8
0
ESM I
T
P 8
0
ESM I
T
P 8
0
ESM I
T
P 8
0
ESM I
T
P 8
0
OLM
OLM
OLM
OLM
OLM
OLM
OLM
OLM
Figure 14: Redundant Coupling of Network Segments